US448542A - Signor of one-half to john newton - Google Patents

Description

(No Model.) 3 SheetsSheet 1.

D. A. QUIGGIN. APPARATUS FOR EVAPORATING SEA OR OTHER WATER.

No. 448,542. Patented Mar. 17, 1891.

ar/e 06?" jme5 a? yy (No Model.) 3 SheetsSheet 2.

D. A. QUIGGIN. APPARATUS FOR EVAPORATING SEA OR OTHER WATER. No. 448,642. Patented Mar. 17,1891:

3 Sheets-Sheet 3 (No Model.)

Patented Mar. 17,1891.

FIG-1H.

m-umo.. wAsmnamN n c iaiTnn STATES PATENT Onrion.

DANIEL ARTHUR QUIGGIN, OF BLUN DELL SANDS, NEAR LIVERPOOL, AS- SIGNOR OF ONE-HALF TO JOHN NEWTON, OF LONDON, ENGLAND.

Measures FOR EVAPORATING SEA on crass WATER.

EEUEFEGATIQN forming part of Letters Patent No. 448,542, dated March 17, 1891.

Application filed June 6, 1890 Serial No. 354:,142. (No model.) Patented in England January 11, 1889, No. 538, and May 16, 1889,1T0. 8,139.

To aZZ whom it may concern.-

Be it lqnown that I, DANIEL ARTHUR Quie- GIN, a subject of the Queen of Great Britain, residing in Blundell Sands, near Liverpool, in the county of Lancaster, England, have invented certain new and useful Improvements in Apparatus for Evaporating Sea or other Water for Obtaining a Supply of Fresh Water, (for which I have obtained Letters Patent in Great jritain, dated January 11 and May 16, 1889, and numbered 538 and 8,139, respectively,) of which the following is a specification.

My invention relates to that class of apparatus in which the sea or other water to be evaporated in orderto obtainasupply of fresh water is heated by passing steam through heat-transmitting surfaces immersed therein, the steam (which I shall hereinafter term primary steam) being condensed or partially condensed thereby. The vapor from the sea or other water, which will be subsequently referred to as secondary vapor, maybe led to a condenser and so form fresh water. .Vhere the apparatus is fitted on board ship, the main condenser of the engines is generally utilized, and the fresh water so formed is used as feed make up for the boilers. In most cases, however, instead of leading the secondary vapor to a condenser, it is found more convenient and economical to lead it or a portion of it through the heattransmitting surfaces of a second evaporator similar to the lirst, in which it is condensed and gives up its heat to the sea or other water in the said second evaporator. The vaporso produced in the second evaporator, which 1 term tertiary vapor, is led to a condenser, or it may be led to the heat-transmitting surfaces of a third evaporator, and so on for a series of evaporators, the vapor produced in the last evaporator of the series being led to a condenser. According to my present invention 1 pass the partially-condensed primary steam after ithas left the first evaporatom through heat-transmitting surfaces in a feed-heater, in which it serves to heat the sea or other "ater used for feeding the everal evaporators and is itself thereby wholl condensed and cooled. hen a number of evaporators are used in series,I feed them all from the one feed-heater, a feed-box being interposed, in which there is a separate feed-valve for each evaporator, said feedvalves being, if necessary, differentiallyloaded to suit the different pressures in the several evaporators.

The heat-transmitting surfaces used in my present invention are preferably constructed as described in the specification and drawings lodged by me with an application dated May 1, 1890, for a patent, Serial No. 350,165.

In order that my invention may be readily understood, reference is made to the accompanying drawings, in which two evaporators are shown in series, together with a feed-heater and feed-box.

Figure I shows the apparatus in elevation, one of the evaporators, which are similar, being in section on the line AA of Fig. II. The evaporators are shown farther apart than usual in order that the connections maybe indicated more clearly. Fig. 11 is a plan of the apparatus, one of the evaporators being in section on the line B B of Fig. 1', the battleplate 14; being removed. Fig. III is an end elevation, the feed-heatcr and feed-box being in sect-ion on the lines C O of Fig. 11; and Fig. IV is a section through the feed-box on the line D D of Fig. Ill.

lhroughout the drawings similar parts are indicated by the same reference-figures, and in the case of sections the direction in which they are viewed is indicated by the small arrows placed adjacent to the letters denoting the plane of section.

The evaporators consist each of an upright cylindrical shell 1, having dished ends, forming the top 2 and bottom 3. The ends are strengthened by a stay-bar 4, which is secured to each and is prolonged through the bottom and serves as a holding-down bolt 5, by means of which the evaporator is secured to its seating 6. The primary steam enters by the pipe 7 and inlet-valve 8 to the inlet-pipe 9. The inlet-pipe is circular in plan and has a number of unions, to which are attached the heattransmitting surfaces 10, which consist of helical coils of crescent-shaped cross-section constructed in accordance with my specificacoils are attached to unions on a condensed steam-outlet pipe 11, similar to the steam-inlet pipe. The partially-condensed steam leaves the evaporator by the pipe 12 and passes into the feed-heater. The secondary vapor leaves outlet is designed to prevent any of the water in the evaporator leaving with the vapor as a result of priming. Over the outlet is held a cup 13. Water trapped in the outlet drainsback into the evaporator by the holes 36 in the pan 13 Priming is also prevented or mitigated by the battle-plate 1'4. -The second ary vapor is led from the first evaporator to the heating-surfaces of the second'evaporator by the pipe 15, and after passing through the said heating-surfaces it leaves the evaporator by the outlet-pipe 16. Where it is not deevaporator, a portion isled through the by pipe 17. This pipe 17is led, into the outletpipe 16 after the manner of an ejeciiQfrl gz zle, so as to draw the secondary vapor through the heating-surfaces. The secondary vapor, which leaves the apparatus by the pipe 16?, and the tertiary vapor, which leavesr bythe outlet-pipe 46, when condensed and cooled, 5

form potable water.

The evaporators are fitted with man -h o1 e doors 18, and blow-oft cocks '19. The; usual mountings, such as safety-valvesand pressure and water gages, are also fitted, butane not shown in the drawings. 1

Referring now to the arrangement for supplying and heating the feed-waterf, which is illustrated in Figs. III and IV, the'feed; heater consists of a cylindrical shell 37, with detachable ends 38, to which the heating-sur faces 39 are attached, these latter being; in communication through their ends with the inlet-pipe 12 and outlet-pipe 40. The partially-condensed primary steam, as before mentioned, enters the heating-snrfaees 39 of the feed-heater by the pipe 12, is wholly Q011- densed therein, and leavesthefeed heaterfas fresh but not potablewater by the ontlet40, and is generally returned tothe boiler. The

feed-box 20 is rectangular in shapefand is divided into two chambers 2.1 ;and122, which spectively. The feed-water enters the feed} heater by the inlet 23, and, after being heated by passing round the heating surfaces 39-, it passes by the two pipes 2. and into the chambers 21 and 22. Each of theseTlatter chambers is connected to its evaporatorjhy a steam-pipe 2 6'and water-pipe 27,"s o that the water-level in each chamber is the same as that in the evaporator to which it is con nected. The feed-waterenters thechambers 21 and 22 by the valves 28 and 2 9,wliieh are controlled by thetloats 30 and 31. The valves are loaded by the weights 32. and 33. The floats are carried on bell-crank levers 34, fulcrumed at and'connected to the valves by thefulerum 35.

an ease a so l Qithe fir t evaporat r o. h a i s,1-.1,r a9e f. t e t edter h r, s bs links 41. The link and short arm of the lerver form a toggle-joint, which, as the float rises, operates to shut the valve. The adjustable screws 42 limit the lift of the valves.

The amount by which the valve is opened for .any given water-level is determined by the the evaporator by the vapor-outlet 13. This.

position of the. valve-seating 43 relatively to The valve-seating is screwed externally, and its position-relatively to the fulcrum, is adjusted by turning it by means of the hexagon head 44-. It is secured in the proper position by the check-nut 45. The

, pipes 24 and 25 are attached to the seatings -of'theval'ves 2S and 29' by unions. In this way the. evaporators are fed from a common 1 supply and the level of the Water kept constant in each, although the pressures in each 1 may be difierent. rer rete is s aa r a q an ym st ro sired to pass the whole of thesecondary vapor through the heating-surfaces. in the secend Where the water to be time to time be blown out through the blowcbcks; i9ftokeep the degree of saturation within the requiredlimit.

Althoughl find it convenient to use tubular helical; coils ct crescent-shaped cross-sect on. c nst uc d. a rdin t y pri r ificatien befoi'e mentioned as heat-transmit engagee in my present invention, I do not confine myself to the use of such coils.

Having now full-y; described my invention,

whatI claim, and desire to secure-by Letters :1 at-6 8 e m i ei a an: evapora appaat s t e erepeaterha b r-ha in ts-s s eth a i a he tin -series a ipe 12, nne ing'theheating-surfaceof the evaporator with n thefeed-water heater, also substantially as described.

. emh natien we er e ofi ap r a feed-.watenheater having, water-pipes lead- 5 ing tothe seve al 'rately cont ev porat rs, eans r ep h 19W i W r ro h team-pipe leading from the i'a l a e qr beo In apparatus m' v p ra ng s a r other nterior b ai ing s pp yofffresh wa supply the first and second evaporators, re; the'com bination ot' twoor more evaporator-s in, series, the heat-transmitting surfaces of ithe second and each succeeding evaporator ibeing connected to. the Vapor-outlet of the v n-ma e mme i t ly p c din a feedheater the heating-surfacesot which are conrators, each chamber being connected to its evaporator by leveling-pipes, and receiving theheated feed-water from the feed-heater by a pipe which communicates with the chamber through a valve controlled by a float in said chamber, the said valves being differentially loaded to suit the diiferent pressures in,

. that of. the, feed water heater, anda conduit- IIO the several evaporators, substantially as described.

4-. In apparatus for evaporating sea or other Water for obtaining a supply of fresh Water, in combination with a series of evaporators, a feed-box having as many chambers as there are evaporators, each chamber being connected to its evaporator by levelii'ig-pipes and communicating with the feed supply by means of a valve controlled by a float in said chamber, said valves being, if necessary, differentially loaded to suit the different pressures in the several evaporators, substantially as described.

5. In apparatus forevaporat-iugseaorother water for obtaining a supply of fresh water, in combination, a feed-box 20, a feed-valve controlled by a float which is attached to one arm of a bell-crank lever, the other arm of the lever and a link connectingit to the valve forming a togglejoint by means of which the valve is operated, and a valveseating a3, ad-

justable through the Wall of the box from the outside in position relatively to the fulcrum of said bell-crank lever, substantially as described.

(3. In apparatus for evaporating sea or other water for obtaining a supply of fresh Water, in combination with the vapor-inlet pipe and condensed-vapor-outlet pipe, a pass-by pipe forming a branch of the inlet-pipe, through which a portion of the vapor passes instead of passing through the heating-surfaces, said pass-by pipe being led into the condensedvapor-outlet pipe after the manner of an ejector, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing Witnesses.

DANIEL ARTHUR QUIGGIN.

Witnesses:

R0131. A. SLOAN, J. E. LLOYD BARNES.

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